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Issaikyoyama volcano

• Volcanic rocks
• Volcanic cone
• middle Pleistocene (0.50 - 0.18 Ma, K-Ar)

• Lithofacies: Orthopyroxene clinopyroxene andesite
• Lithofacies: Agglutinates, Lavas (more than 7 sheets), Pyroclastics

• Thickness: 50 m or thinner
• Upper limit: Unconformity (Maedaiten volcano, Takayama volcano, Jododaira volcano)
• Lower limit: Unconformity (Shionokawa volcano, Takakurayama volcano)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Mount Issaikyo, Fukushima city - Inawashiro city, Yama county, Fukushima pref.; Jododaira - Iodaira, Fukushima city, Fukushima pref.; Okurafukazawa creek - Lake Goshikinuma - Mount Hiraishi, Inawashiro city, Yama county, Fukushima pref.

• Furukawa et al. (2018) Geology of the Azuma Yama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 74p. (in Japanese with English abstract 3p.)
• Hasegawa et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.33-48 DOI